<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Lactic Acid Concentration Measurement Data</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="R.css" />
</head><body>

<table width="100%" summary="page for lactic"><tr><td>lactic</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Lactic Acid Concentration Measurement Data</h2>

<h3>Description</h3>

<p>Data on the Calibration of an Instrument that Measures
Lactic Acid Concentration in Blood, from Afifi and Azen (1979) -
comparing the true concentration X with the measured value Y.
</p>


<h3>Usage</h3>

<pre>data(lactic, package="robustbase")</pre>


<h3>Format</h3>

<p>A data frame with 20 observations on the following 2 variables.
</p>

<dl>
<dt><code>X</code></dt><dd><p>True Concentration</p>
</dd>
<dt><code>Y</code></dt><dd><p>Instrument</p>
</dd>
</dl>



<h3>Source</h3>

<p>P. J. Rousseeuw and A. M. Leroy (1987)
<em>Robust Regression and Outlier Detection</em>;
Wiley, p.62, table 10.
</p>


<h3>Examples</h3>

<pre>
data(lactic)
summary(lm.lactic &lt;- lm(Y ~., data=lactic))

</pre>


</body></html>
